I'm trying to find information how do we take a screenshot on Windows 7 that will actually create a screenshot file like .png in to your desktop like on mac where you can do it by press Command+Control+Shift+4.

In windows all I know is that I can do it by press press = Windows captures the entire screen and copies it to the clipboard.

or for the Active windows I can just do hold and press = Windows captures only the currently active window and copies it to the clipboard.

Right now I'm using maComFort which it gives me functionality of Mac like keyboard that I can take screenshot in such the same way with Mac OS X but really it changes many of the key in my keyboard in the way I don't like.